1,3-Diacyl derivatives of imidazolidine

ABSTRACT

1,3-Diacyl imidazolidines and hexahydropyrimidines were prepared by the reaction of formaldehyde and an N,N&#39;&#39;-alkylenebisamide in the presence of a strong acid catalyst, the substituent acyl groups being acetyl, butyryl, pentanoyl, hexanoyl, heptanoyl, octanoyl, nonanoyl, decanoyl, palmitoyl, stearoyl, and oleoyl. These compounds exhibit antimycotic activity.

United States Patent [1 1 Mod et al.

l 1,3-D1ACYL DERIVATIVES OF lMlDAZOLlDINE [75] Inventors: Robert R. Mod; Frank C. Magne;

Gene Sumrell, all of New Orleans; Arthur F. Novak, Baton Rouge, all of La.; James M. Solar, Lubbock, Tex.

[73] Assignee: The United States of America as represented by the Secretary of Agriculture, W'ashington, DC,

22 Filed: Mar. 4, 1974 [ll] Appl No: 448,429

Related US. Application Data [62] Division of Scr4 No. 54,698, June l8. i971,

1 1 Oct. 7, 1975 3,1 |2 l55 ll/l963 Vail ct al. a, 260/3097 X OTHER PUBLlCATlONS Mod et 21],, Journ. Amer. Oil Chemists Society, 48(5), p. 254. 1971 Mod et al., Journ Amerw Oil Chemists Society, 48(5), p 257, l97| Primary Examiner-Ethel G, Love Attorney, Agent, or Firm-M, Howard Silverstein; Max D Hensley [57] ABSTRACT 1,3-Diacyl imidazolidines and hexahydropyrimidines were prepared by the reaction of formaldehyde and an N,N-alkylenebisamide in the presence of a strong acid catalyst, the substituent acyl groups being acetyl. butyryl, pentanoyl, hexanoyl, hcptanoyl, octanoyl, nonanoyl, decanoyl, palmitoyl. stearoyl, and olcoyl. These compounds exhibit antimycotic activity.

2 Claims, N0 Drawings 1.3-DIACYL DERIVATIVES OF IMIDAZOLIDINE This is a division of application Ser. No. 154,698, filed June l8, l97l, now abandoned.

A non-exclusive. irrevocable, royalty-free license in the invention herein described. throughout the world for all purposes of the United States Government. with the power to grant sublicenscs for such purposes, is hereby granted to the Government of the United States of America.

This invention relates to certain new nitrogen containing organic compounds and to a novel process for the preparation of these compounds. More particularly. this invention relates to N.N'-diacyl derivatives of imidazolidine where R and R in formulas l and ll may be the same organic radical or different organic radicals containing from one to about 2 l carbons, and may be saturated or unsaturatcd alkyl groups, or addition or substitution products thereof. The substituted imidazolidines and hexahydropyrimidines that are the subject of this invention are characterized by the fact that as growth inhibitors. they are effective against a variety of pathogenic molds.

The findings herein disclosed are considered remarkable in that in some notable instances compounds that are closely related from the point of view of chemical architecture exhibit quite opposite effects against the same organisms. For example, one compound may exhibit properties as a growth inhibitor against one particular organism while a closely related counterpart may serve to promote increased growth for the same organism. Some of these new compounds exhibit broad antimycotic spectrum. whereas others exhibit selective antimycotic spectrum.

The compounds which are the subject of this invention are represented by formulas l and II in which the acyl groups are: acetyl. butyryl. pentanoyl. hcxanoyl,

heptanoyl. octanoyl. nonanoyl. decanoyl, palmitoyl,

stearoyl. and oleoyl.

These new nitrogen-containing compounds were prepared by a novel procedure involving the reaction of a diamide with formaldehyde in the presence of a catalytic amount of a strong acid such as hydrochloric acid. The reaction may be facilitated by use of a solvent such as acetic acid. The reaction may be represented by the following equation:

O O N CR ll H w RCNHlCHg NHCR' +HCHO (C CH where n is 2 or 3. The reaction is unexpected since when n is l or a number greater than 3 no reaction occurs and the diamide may be recovered quantitatively from the reaction mixture by removal of volatile materials.

The bioactivity of these various new nitrogencontaining compounds has been established by us in vitro but, will be apparent to those skilled in the arts pertaining to the growth inhibition of bacteria, yeast. and molds, the compounds, besides being used as such, will for utilitarian purposes commonly be formulated using a diluent that can be either liquid, viscous, or solid.

A wide variety of extending agents is operable. the only significant requirement being that the diluent or extender be inert with respect to the compound involved. Petroleumjellies, various alcohols and polyols, vegetable oils and the like are suitable.

Dehydrated mycological agar at pH 7.0 was used to test the inhibition of the test organisms by the compounds being screened. Suspensions of the test organisms were prepared by transferring a loop of spores into sterile saline. Hardened agar plates were inoculated by placing three drops of the suspension onto the agar. The micro-organisms were spread over the surface of the plates with sterile glass rods. These plates were employed in the activity estimation against microbial growth. Filter paper discs 6.5 mm in diameter. made from Whatman Number 1 filter paper were used to evaluate the liquid compounds. Stainless steel cylinders 5 mm I.D. were used for the samples which were solids. The paper discs wetted until they were completely saturated with the test compound or stainless steel cylinders containing the test solid compound were placed on the surface of the agar plates inoculated with the test organisms. To eliminate any errors which could result from an insufficient number of tests. a miniumum of three experiments. at different times, employing duplicate plates were made for each compound under test. All plates were incubated at the optimum growing temperature for each organisms and readings were taken after 24. 48. 72. and hr periods.

The organisms used in the tests were Trichophylrm ruhrum, T. violuc'eum, Microsporum qypseum, and Aspergillus flm'us. They were obtained from stock cultures. The data from these tests are tabulated in Table l. The physical constants and analytical data for the l,3-diacyl derivatives of imidazolidine and hexahydropyrimidine used in the tests are tabulated in Table II.

Specific examples showing the preparation of each of the new compounds being claimed are set forth below along with appropriate data in tabular form which is being submitted for the purpose of establishing the growth inhibiting properties of the claimed compounds.

EXAMPLE 1 l ,3-Diacetylimidazolidine Four grams (0.028 mole) of N,N

EXAMPLE 2 1,3-Dibutyrylimidazolidine This compound was prepared by the procedure of Example 1 from 3 grams (0.015 mole) of N,N'- ethylenebisbutyramide, 2.7 grams (0.032 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product, l,3-dibutyrylimidazolidine was obtained in 78% yield.

EXAMPLE 3 l ,3-Dipentanoylimidazolidine This compound was prepared by the procedure of Example 1 from 4 grams (0.018 mole) of N,N'- ethylenebispentanamide, 3.2 grams (0.039 mole) of a 36.87: formaldehyde solution, and 0.3 ml of concentrated hydrochloric acid. The product, 1,3- dipentanoylimidazolidine, was obtained in 90% yield.

EXAMPLE 4 l,3-Dihcxanoylimidazolidine Three grams (0.012 mole) of N,N ethylenebishexanamide, 2.1 grams (0.026 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid were placed in a flask equipped with stirring bar. The temperature was raised to 50C with stirring. after which the reaction was continued for 2 hours. After the addition of cold water, the white precipitate that formed was removed by filtration, employing a Buchner funnel, washed with water, recrystallized twice from absolute ethyl alcohol and dried in a vacuum desiccator over phosphorous pentoxide. The product, 1 ,3- dihexanoylimidazolidine, was obtained in 90% yield.

EXAMPLE 5 1 ,3-Diheptanoylimidazolidine This compound was prepared by the procedure of Example 4 from 4 grams (0.014 mole) of N,N'- ethylenebisheptanamide, 1.5 grams (0.018 mole) of a 36.871 formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product. 1.3-dihcptanoylimidazolidine was obtained in 90% yield.

EXAMPLE 6 l .3-Dioctanoylimidazolidine This compound was prepared by the procedure of Example 4 from 4 grams (0.013 mole) of N,N'-

ethylenebisoctanamide, 2.3 grams (0.028 mole) of a 36.87: formaldehyde solution, 25 ml of acetic acid, and 0.3 ml of concentrated hydrochloric acid. The product, 1 ,3-dioctanoylimidazolidine, was obtained in yield.

EXAMPLE 7 l,3-Dinonanoylimidazolidine This compound was prepared by the procedure of Example 4 from 4 grams (0.012 mole) of N,N'- ethylenebisnonanamide, 1.3 grams (0.016 mole) of a 36.8% formaldehyde solution. 25 ml of acetic acid, and 0.3 ml of concentrated hydrochloric acid. The product, l,3-dinonanoylimidazolidine, was obtained in 90% yield.

EXAMPLE 8 1 ,3-Didecanoylimidazolidine This compound was prepared by the procedure of Example 4 from 4 grams (0.011 mole) of N,N'- ethylenebisdecanamide, 2 grams (0.025 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product, l,3-didecanoylimidazolidine, was obtained in 90% yield.

EXAMPLE 9 1 ,3-Dipalmitoylimidazolidine This compound was prepared by the procedure of Example 4 from 3.2 grams (0.006 mole) of N,N'- ethylenebispalmitamide, 1.1 grams (0.013 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product, l,3-dipalmitoylimidazolidine, was obtained in 89% yield.

EXAMPLE l0 1 ,3-Distearoylimidazolidine This compound was prepared by the procedure of Example 4 from 4 grams (0.007 mole) of N,N'- ethylenebisstearamide, 1.2 grams (0.014 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product, 1,3-distearoylimidazolidine, was obtained in 90% yield.

EXAMPLE 1 1 l ,3-Dioleoylimidazolidine This compound was prepared by the procedure of Example 4 from 3 grams (0.005 mole) of N,N- ethylenebisoleamide, 1.1 grams (0.013 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product, 1,3-dioleoylimidazolidine, was obtained in 90% yield.

EXAMPLE 12 l ,3-Diacetylhexahydropyrimidine Four grams (0.025 mole) of N,N'- propylenebisacetamide, 4.5 grams (0.055 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid, and 0.3 ml of concentrated hydrochloric acid were placed in a flask equipped with stirring bar. The temperature was raised to 50C with stirring, after which the reaction was continued for 2 hours. The acetic acid, excess formalin and hydrochloric acid were removed by distillation at reduced pressure. The product, 1,3-diacety1- EXAMPLE 14 l .3-Dipentanoylhexahydropyrimidine Four grams (0.017 mole) of N,N'-

propylenebispentanamide, 3 grams (0.037 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid were placed in a flask equipped with stirring bar. The temperature was raised to 50C with stirring, after which the reaction was continued for 2 hours. The mixture was cooled, diluted with cold water, extracted with diethyl ether, washed with water and dried over anhydrous sodium sulfate. After filtration, the solvent was removed by stripping under reduced pressure, leaving the liquid product, 1,3-dipentanoylhexahydropyrimidine, in 90% yield.

EXAMPLE 1 5 l,3-Dihexanoylhexahydropyrimidine Three grams (0.01 1 mole) of N,N

propylenebishexanamide, 1.5 grams (0.018 mole) of a 36.871 formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid were placed in a flask equipped with stirring bar. The temperature was raised to 50C and the reaction was continued for 2 hours. The mixture was cooled, diluted with cold water. extracted with benzene, washed with water and dried over anhydrous sodium sulfate. After filtration, the solvent was removed by stripping under reduced pressure, leaving the product, 1,3-dihexanoylhexahydropyrimidine, in 94% yield.

EXAMPLE [6 1 ,3-Diheptanoylhexahydropyrimidine This compound was prepared by the procedure of Example from 4 grams (0.013 mole) of N,N'- propylenebisheptanamide, 2.4 grams (0.029 mole) of a 36.871 formaldehyde solution. 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product, l,3-diheptanoylhexahydropyrimidine, was obtained in 84 /1 yield.

EXAMPLE 17 l .3-Dioctanoylhexahydropyrimidine This compound was prepared by the procedure of Example 15 from 4 grams (0.012 mole) of N,N- propylenebisoctanamide, 2.6 grams (0.031 mole) of a 36.871 formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product, l.3-dioctanoylhexahydropyrimidine. was obtained in 90 yield.

EXAMPLE 1 8 l ,3-Dinonanoylhexahydropyrimidine This compound was prepared by the procedure of Example 15 from 4 grams (0.011 mole) of N,N- propylenebisnonanamide, 2 grams (0.024 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product, l,3-dinonanoylhexahydropyrimidine, was obtained in 92% yield.

EXAMPLE 19 1,3-Didecanoylhexahydropyrimidine This compound was prepared by the procedure of Example 15 from 4 grams (0.011 mole) of N,N- propylenebisdecanamide, 2 grams (0.024 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid. The product, l,3-didecanoylhexahydropyrimidine, was obtained in yield.

EXAMPLE 20 l,3-Dipalmitoylhexahydropyrimidine Three grams (0.005 mole) of N,N

propylenebispalmitamide, 1.5 grams (0.018 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml of concentrated hydrochloric acid were placed in a flask equipped with stirring bar. The temperature was raised to 50C with stirring after which the reaction was continued for 2 hours. After the addition of cold water, the white precipitate that formed was removed by filtration employing a Buchner funnel, washed with water, recrystallized from methyl alcohol and dried in a vacuum desiccator over phosphorous pentoxide. The product, l,S-dipalmitoylhexahydropyrimidine, was obtained in 90% yield.

EXAMPLE 21 l ,3-Distearoylhexahydropyrimidine This compound was prepared by the procedure of Example 20 from 3 grams (0.005 mole) of N,N- propylenebisstearamidc, 1 grams (0.012 mole) of a 36.8% formaldehyde solution, 25 ml of acetic acid and 0.3 ml concentrated hydrochloric acid. The product, 1,3-distearoylhexahydropyrimidine, was obtained in 90% yield.

EXAMPLE 22 1 ,3Dioleoylhexahydropyrimidine This compound was prepared by the procedure of Example 15 from 4 grams (0.007 mole) of N,N'- propylenebisoleamide, 1.2 grams (0.015 mole) of a 36.8% formaldehyde solution, 25 m1 of acetic acid and 0.3 ml ofconcentrated hydrochloric acid. The product, l,3-dioleoylhexahydropyrimidine, was obtained in 88% yield.

EXAMPLE 23 N-( 9, l O-epithiooctodecanoyl )morpholine 139 g (0.37 mole) of N-(9,lO-epoxystearoylJmorpholine was added dropwise at room temperature to a well stirred solution suspension containing 74 g (0.97 mole) thiourea and 123 g 1.01 moles) benzoic acid in 1 liter of acetone. Stirring was continued for 3 hours beyond addition of the epoxide. The reaction mixture 7 8 was then treated with 69 g (0.65 moles) of Na CO=, 21s elemental analysis was found to be C 69.70%. H a 10% aqueous solution and the organic phase ex- 10.9571. N 4.26%. S 7.28%. Theoretical values are C tracted with hexane, washed. dried and stripped. The 69.34%. H 10.77%. N 3.6871, S 7.80%.

TABLE I Antimycotic Activil ul 1.3-Diucy1 Derivatives of Imiduzulidinc and Hcxuhydrupyrimidine Sample Antimicrobial Activity No. Compound Micrworgunism A B C D E F (i l 1 .3-Dincety1imiduzulidine 2 l .3-DibutyryIimidnzulidinc xx 11- x 3 1.3-Dipcntunoylimidaizulitlinc 4 1.R-Dihexunog.Iimiduzolidinc +1 1+- +1 11 5 1.3Dihcptunoylimiduzolidine xx x 6 1 .3-Dioctunnylimiduxulidine 7 1.3-Dinonztntiylii'nidulolidine -1F x 8 1.3-Didec;|nuylimidulolidinc xx x x x 9 1.3-Dipu1mitoy1imiduzolidine xx 10 1.3-Distcurnylimiduzolidine xx x x xx 1 l 1.3-Dioleoylimiduzolidine xx x xx 12 1.3Diuc|:ty1hexuh dropyrimidine 4+ 13 1.3-Dihutyry1hcxuhydropyrimidinc -11 l4 1 .3-Dipcntnnoy1hcxuhydropyrimidinc -+1 -11- -11 1+- 15 1 3-Dihexunuylhcxuhydmpyrimidinc +1- 1-1- 1+ 16 I .3-Diheptunoylhcxuhydmpyrimidine H- +l- 'H- 17 1,3-Dioctunoylhexuhydropyrimidinc -11- H 18 1 3-Dinonunuylhcxzlhydropyrimidinc xx x xx 19 1 .3-Didecunoylhcxuhydmpyrimidinc xx x x x 20 1.3-Dipu1mitoylhcxuhydropyrimidine x x x xx 21 1.3-Distcumylhexuhydmpyrimidine 22 1.3-Dio|coy1hexahydropyrimidinc 23 N-(9.10'Epithiunctudccunuyl )morpho x xx 4-1- xx Iinc l+- The zone 01' inhibition was alt least 0.5 cm beyond disc or cylinder area at 120 hrs. The zone 01 inhibition was less than 0.5 cm beyond disc or cylinder area 111 120 hrs. xx Organism failed to grow on disc or cylinder area at 120 hrs. \t Slight growth on the saturated disc or cylinder urea at 120 hrs. N0 inhibition detectable A Trichnphyton ruhrum.

B Microsporu m gypscunl. C Aspergillus flnvus. D Trichnphyton viuluceum. E Candida ulhicains. F Bacillus species. C Pseudomonus species.

TABLE II Elemental Analyses and Properties of 1,3-Diacy1 Derivatives of Imiduzulidine and Hcxahydropyrimidinc Yield Density NJ" mp C 7( C 71 H N 7: C Exp. Theory Exp. Theory Exp. Theor 1,3-Diuccty1imiduzolidinc -92 5373 53.83 7.77 7.75 17.91 17.94 1,3-Dihutyrylimiduznlidinc 78 84-86 62.35 62.23 9.77 9.50 13.10 13.20 1 3Dipcnlzmoylimiduzulinc 90 89-91 65.61 64.95 10.13 10.06 11.75 1 1.66 1,3-Dihexunnylimiduzolidine 90 91-93 67.25 67. I 3 10.54 10.52 10.47 10.44 l,3-Diheptamuylimidnzulidinc 90 92-94 69.3 3 68.87 10.97 10.88 9.38 9.45 1,3-Diucinnoylimiduzolidine 911 93-95 70.14 70.31 11.25 1 1.18 8.63 K 63 1 3-DinonunoyIimiduzolidinc 90 97-99 71.92 71.55 1 1.55 1 1.44 7.73 7.94 1.3Didecunoylimiduzulidinc 90 100-102 72.52 72.59 1 1.67 11.65 7.25 7.36 1.3-Dipu1mituy1imiduzolidine 89 108-1 10 76.85 76.30 12.50 12.44 5.04 5 09 1 3-Disteuruylimidulolidinc 90 108-1 10 77.85 77.41 12.79 12.66 4.75 4.63 1,3-Diolcoylimiduzulidine 90 50-52 77.45 77.87 12.01 12.41 4.66 4.66 1.3-DiucctyIhexuhydmpyrimidinc 2 1.1378 1.4911 56.21 56.48 8.44 8.35 16.44 16.47 1j-Dibutyrylhexuhydropyrimidine 2 1.0454 1.4847 63.66 63.71 9.93 9.80 12.47 12.31% l 3-DipentzlnnyIhexzlhydrupyrimidine 90 1.0244 1.4814 65.50 66.11 10.31 10.31 10.81 1 1.02 1.3-Dihexal|my1hexuhydmpyrimidinc 94 0.9779 1.4797 67.92 68.06 10.77 111.71 9.96 9.92 1 3-Dihept;lnuylhexuhydrupyrimidinc 84 0.92143 1.4768 68.88 69.64 10.96 1 1.04 8.97 9.02 I.3-Dioctunoylhcxnhydropyrimidinc 90 0.9673 1.4774 70.59 70.96 1 1.35 1 1.32 8.34 8.28 l 3-Dinunamoy1hexzlhydrupyrimidinc 92 0.9576 1.4760 71.57 72.08 11.33 11.55 7.72 7.64- l 3JDideczmvylhcxalhydmpyrimidinc 90 28-30 73.27 73.06 11.91 11.75 7.14 7.10 l 3-Dipn1mitu lhcxuhydmpyrimidine 90 (14-66 761 5 7 g 53 15 4490 493 |.3-Dis\e;|my1hexzihytlmpyrimidinc 90 66-68 714.05 77.73 13.36 12.72 4.37 4.51 l.3-Dio1euy1hexuhydropyrimidine xx 0 1 83 77.75 77 m 11.95 12.44 4.54 4.55

w l i where R and R are saturated or unsaturated alkyl 1. A process for preparing a compound represented groups, which process comprises reacting N,N'- y th f rmu a ethylenebisamide with formaldehyde in the presence of a strong acid catalyst.

2. The process of claim 1 wherein acetic acid is used i as a solvent, hydrochloric acid is the catalyst, and the (H reaction is carried out at a temperature from ambient to about 100C.

m i V maxi 

1. A PROCESS FOR PREPARING A COMPOUND REPRESENTED BY THE FORMULA
 2. The process of claim 1 wherein acetic acid is used as a solvent, hydrochloric acid is the catalyst, and the reaction is carried out at a temperature from ambient to about 100*C. 